Temperature stable and versatile polarization modulators for bioimaging applications

Jean Rehbinder; Jean Dellinger; Briséis Varin; Marc Torzynski; Yoshitate Takakura; Christian Heinrich; Jihad Zallat

doi:10.1117/12.2622121

20 May 2022 Temperature stable and versatile polarization modulators for bioimaging applications

Jean Rehbinder, Jean Dellinger, Briséis Varin, Marc Torzynski, Yoshitate Takakura, Christian Heinrich, Jihad Zallat

Proceedings Volume 12136, Unconventional Optical Imaging III; 121360I (2022) https://doi.org/10.1117/12.2622121
Event: SPIE Photonics Europe, 2022, Strasbourg, France

Abstract

Polarization imaging has found many applications ranging from material sciences to biomedical applications to astronomy. A widely used class of polarimeters is based on Liquid Crystal Variable Retarders (LCVR). Indeed, LCVRs are ideal for imaging application: they are versatile polarization modulators with fast response times and a large aperture. However, the main drawback of such systems is their strong dependence on temperature. As a consequence, they require frequent and time-consuming calibration procedures. In this work, we propose a new design for a temperature-stable Variable Retarders cell compatible with LCVR-based polarimeter designs. We formalize a phenomenological model for the temperature dependency of LCVRs and derive theoretical expressions for the working points of the temperature stable cells. We used a heated enclosure to validate the proposed design experimentally. Stable operation of a single cell built from commercially available LCVRs is demonstrated on a wide range of temperatures (25-50°C). Two cells were then combined to obtain a Polarization State Analyzer (PSA), acting either as a standalone Stokes polarimeter or as part of a Muller polarimeter in combination with a Polarization State Generator (PSG). In both cases, excellent stability is demonstrated compared to similar LCVR based polarimeters.

Conference Presentation

Citation Download Citation

Jean Rehbinder, Jean Dellinger, Briséis Varin, Marc Torzynski, Yoshitate Takakura, Christian Heinrich, and Jihad Zallat "Temperature stable and versatile polarization modulators for bioimaging applications", Proc. SPIE 12136, Unconventional Optical Imaging III, 121360I (20 May 2022); https://doi.org/10.1117/12.2622121

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